Hf coaxial plug connector

ABSTRACT

A HF coaxial plug connector comprises a clamping ring which can be fixed on the outer casing of a cable. The connector has a conical machined out part, onto which the end of the cable casing is crimped and on the end of the cable casing a cone with the same setting angle is axially clamped. The cone is formed by a pressure ring, separated from a head of the plug connector, and the pressure ring is adapted to be axially clamped by an end annular face of the head of the plug connector without carrying out a rotary movement in relation to the clamping ring.

United States Patent [191 Spinner [111 3,829,800 [451 Aug. 13, 1974 HF COAXIAL PLUG CONNECTOR [76] Inventor: George Spinner, ErzgieBereister 33,

' 8 Munich 2,Germany [22] Filed: June 2, 1972 [21] Appl. No.: 259,160

[30] Foreign Application Priority Data June 4, 1971 Germany 2127927 [52] US. Cl. 333/97 R, 174/75 C [51] Int. Cl H01p 1/04, H02q 15/08 [58] Field of Search... 333/97 R; 339/177 E, 268 S; 174/89, 88 C, 75 C; 81/71; 285/3345 [56] References Cited UNITED STATES PATENTS 1,912,299 5/1933 Parker 285/3345 2,983,779 5/1961 Dumire et al. 174/75 C 3,040,288 6/1962 Edlen et a1 285/3345 3,199,061 8/1965 Johnson et a1. 174/75 C 3,245,027 4/1966 Ziegler, Jr 333/97 R 3,439,294 4/1969 Flanagan et al 333/97 R 101/ ill /4 /2 tie 3,460,072 8/1969 Ziegler, Jr 333/97 R 3,654,577 4/1972 Spinner et a1 333/98 R FOREIGN PATENTS OR APPLICATIONS 1,090,288 10/1960 Germany 174/75 C Primary ExaminerJames W. Lawrence Assistant Examiner-Wm. H. Punter Attorney, Agent, or FirmOstr0lenk, Faber, Gerb & Soffen [57] ABSTRACT A HF coaxial plug connector comprises a clamping ring which can be fixed on the outer casing of a cable. The connector has a conical machined out part, onto which the end of the cable casing is crimped and on 12 Claims, 12 Drawing Figures HF COAXIAL PLUG CONNECTOR BACKGROUND OF INVENTION 1. Field to which Invention Relates The invention relates to a HF coaxial plug connector comprising a clamping ring which can be fixed on the outer casing of a cable and which has a conical machined out part, onto which the end of the cable casing is crimped and on the end of the cable casing a cone with the same setting angle is axially clamped.

2. The Prior Art By means of this conical clamping action of the crimped metallic cable casing, for example a corrugated casing cable, a reliable and permanent electrical contact connection is obtained. In the case of previously proposed HF coaxial plug connectors the cone forms part of the plug connector head and in the case of the axial clamping action turns in relation to the clamping ring and to the crimped over end of the cable casing so that the latter may be crushed and the making of contact at the periphery is unreliable. Disadvantages also arise in this respect, more particularly in the case of cables with a welded cable casing owing to the thickening brought about by welding.

SUMMARY OF INVENTION One aim of the invention is to provide a cable fitting, which can be connected without soldering, for completely insulated or foam material insulated cables, in the case of which reliable electrical contacting is ensured while providing for ease of assembly.

The present invention consists in a HF coaxial plug connector comprising a clamping ring which can be fixed on the outer casing of a cable and which has a conical machined out part, onto which the end of the cable casing is crimped and on the end of the cable casing a cone with the same setting angle is axially clamped, in which the cone is formed by a pressure ring, separated from a head of the plug connector and the pressure ring is adapted to be axially clamped by an end annular face of the head of the plug connector without carrying out a rotary movement in relation to the clamping ring. Such a pressing ring separated from the head of the plug connector can be used in the case of the most different types of cable fittings and plug connectors in accordance with different designs, as will appear from the description of specific embodiments of the invention with reference to the drawing.

In accordance with a further development of the invention the clamping ring can be fixed in the same manner as is the case with the plug connector head in a crimping device, by means of which the end of the cable casing can be crimped onto the conical machined out part. As a result the previously existing difficulties are avoided, which in the case of such cable plug connectors arose in crimping the casing onto the conical machined out part, for crimping with a hammer, as is possible in the case of cable plug connectors with a flat end face, is only possible in the case of plug connectors of the above-mentioned type with the expenditure of much time and effort. Owing to the fact that in accordance with the invention the crimping device is screwed directly onto the clamping ring a simple and reliable crimping of the cable casing onto the clamping ring is guaranteed.

In the case of cable plug connectors in the case of which the plug connector head is fixed by means of a nut with a lip acting as a shoulder, there is the provision in accordance with a further feature of the invention that the shoulder part of the crimping device is provided with an external screw thread onto which the nut with a lip acting as a shoulder can be screwed. In this case owing to the screwing of the crimping device by means of the nut the clamping ring is fixed axially and radially so that in this manner it is also possible to obtain a reliable crimping action.

In order to extend the range of application of the crimping devices the latter are preferably provided with a male with an internal and external screw thread. Further developments of the cable plug connector and associated crimping device, for which protection is claimed, will be found in the following description of specific embodiments referring to the accompanying drawings.

LIST OF SEVERAL VIEWS OF DRAWINGS FIG. 1 is a partially sectioned view of a cable plug connector for Cellflex cable.

FIG. 2 shows a modified embodiment of the cable plug connector in accordance with FIG. 1.

FIG. 3 shows a further embodiment of the cable plug connector for Cellflex cable.

FIG. 4 shows a view of a crimping tool with a cable offset jig ring for use in conjunction with the cable plug connectors in accordance with FIGS. 1 to 3.

FIG. 5 shows a cable plug connector for Comfiex cable with a captive inner conductor and a plug connector head which is fixed in position by means of a nut with a lip acting as a shoulder.

FIG. 6 shows a further embodiment of a cable plug connector with a plug connector head fixed by means of a nut with a lip.

FIG. 7 shows a crimping device which can be used more particularly in conjunction with the cable plug connectors in accordance with FIGS. 5 and 6.

FIGS. 8 8a, 8b, 8c and 9 show two embodiments of cable couplings constructed in accordance with the invention.

DESCRIPTION OF PREFERRED EMBODIMENTS In all embodiments of the invention a cable clamping ring 11 is mounted on the cable casing 10 and can be screwed in position if desired. On the conical machined out part of the clamping ring 11 the end of the cable casing is crimped, on which again a conical pressure ring 12 fits. The axial clamping action between the clamping ring 11 and the pressure ring 12 is obtained automatically on screwing home the plug connector head 13. In the case of the embodiments in accordance with FIGS. 1 to 3 the clamping ring is provided with an external screw thread 14, on which a screw threaded sleeve 15 of the plug connector head 13 can be screwed. On the same thread 14 the screw threaded coupling 16 of the crimping device in accordance with FIG. 4 can also be screwed. The crimping sleeve 16, which in its front part is conical, of the crimping device can be actuated by means of the handle 18. For the purpose of crimping the crimping device in accordance with FIG. 7 can also be used, which is provided with an internal screw thread 16a and furthermore carries an external screw thread 16b, whose function will be described below.

In the case of the embodiment in accordance with FIG. 1 a seal 19 is placed between the clamping ring 11 and the screw threaded sleeve of the plug connector head. Sealing between the clamping ring 11 and the cable casing is carried out by means of a sealing mass 20, which can be injected through an opening which can be closed by means of a screw 21. The cable is provided with solid or full insulation 22 between the internal conductor and the outer conductor and adjacent to the insulation there are insulating rings 23 and 24 of the cable plug connector, more particularly of foam material. There is a certain radial spacing between the ring 24 and a resilient internal conductor bush 101 in order for the bush 101 to move radially a certain distance in order to allow for eccentricity. This internal conductor contact bush101 has its contact annular face lying against the front end face of an internal conductor pin 102 which is screwed into the cable internal conductor 103. The internal conductor pin 102 carries a flange 104, which rests axially against the cable insulation 22. This internal conductor pin 102 has a screw threaded hole, into which an internal conductor section 105 is screwed and the section 105 presses the inner flange 107 of the resilient bush against the internal conductor pin 102 by means of a flange 106. The resilient tabs of the resilient bush .101 lie against the internal conductor section 105, which at its front end carries an insulating support 109 via a screwed in pin 108. The support is carried in the external conductor plug connector section 110. The pin 108 holds the internal conductor connection 111 of the insulating support 109. Owing to this internal conductor plug connector both radial and axial tolerances can be allowed for and in every case there is a satisfactory contacting via the resilient tabs.

The construction in accordance with FIG. 2 embodying the invention differs from that in accordance with FIG. 1 substantially as regards the construction of the plug connector head. While in the case of FIG. 1 the plug connector head has a nut with a lip acting as a shoulder, the plug connector head in accordance with FIG. 2 has an external screw thread, onto which a nut with a lip acting as a shoulder can be screwed. In accordance with FIG. 2 the external conductor bush 110 is divided up to form resilient tabs, while in the case of the embodiment in accordance with FIG. 1 it was rigid. As can be seen the plug connector in accordance with FIGS. 1 and 2 can be connected with each other. In the case of all embodiments of the invention the plug connector head is provided with an internal conductor bush, which resiliently engages the internal conductor of the cable. In the case of this embodiment of the invention an internal conductor plug connection of the type indicated in FIG. 1 is provided with a provision for allowing for eccentricity. In the case of the embodiment of FIG. 3, however, the internal conductor section 112 is screwed into the insulating support 109. The step a of the internal conductor 112 at the exit of the support 109 is allowed for by a chamfered surface b of the sleeve with an internally extending lip. In this case as well an air gap is intentionally left between the foam material insulation ring 24 and the bush 101 which makes possible a compensation for eccentricity. The dielectric formed as a result in layers is so arranged that it has the desired wave resistance. The screw thread of the internal conductor section 112, with which it is screwed into the insulating support, is so dimensioned that with the dielectric constant of the insulating support 109 the desired wave resistance is ensured.

The external conductor plug connector connection is formed by a slotted bush 113 in the form of a deepdrawn hollow rivet.

As is the case with the embodiment shown in FIGS. 1 and 2 there is also in the case of the embodiment of FIG. 3 a rubber ring 30 placed between the cable casing 10 and the clamping ring 11, which prevents escape of the injected sealing material 20.

In other respects the embodiment in accordance with FIG. 3 corresponds substantially to the embodiment in accordance with FIG. 1.

In the case of the embodiments of FIGS. 5 and 6 the clamping ring 11 is provided with a nut 25 with an internal lip, which can be screwed onto an external screw thread 26 of the plug connector head. Into the screw thread of the nut 25 it is also possible to screw in the external screw thread 16b of the crimping device in accordance with FIG. 7 so that, again, the clamping ring 11 can be so fixed that the end of the cable casing 10 can easily be crimped on.

The crimping tool in accordance with FIGS. 4 and 7 have inspection holes 114 (only indicated in FIG. 4), through which the position of crimping can be observed. In the case of the embodiment of FIG. 7 a helical compression spring 115 is provided which moves the sleeve 17 axially forwards in order to tension it so that on screwing on and screwing in the part 16 the crimping on is carried out evenly under a spring force.

In the case of the embodiment of FIG. 6 the ring 240 of insulating material, which surrounds the resilient bush 101 with clearance so as to leave an annular gap, is produced integrally with the insulating support 109a. The attachment can be carried out by injection on (for example, using polytetrafluoroethylene) or by shrink ing on.

The embodiments in accordance with FIGS. 8 and 9 show cable couplings in the case of which instead of the plug connector head an intermediate piece 27 is provided, which is connected with the means secured in the cable.

The construction of the means securing the cable corresponds to the embodiment of FIG. 6, though instead of the plug connector head 13 the transition piece 27 is screwed into position, which has the same external screw thread 26 as the plug connector head. In accordance with the embodiment of FIG. 9 the transition piece 27 is provided with an internal screw thread and is screwed onto a clamping sleeve 28, which clamps the clamping ring 11 in conjunction with the pressing ring 12 axially so as to pinch the crimped on end. Sealing is brought about in this case by means of a shrunk-on sleeve 29.

In the case of the embodiments in accordance with FIGS. 8 and 9 as well at the position of coupling the inner conductor is again constructed as a plug connection in accordance with a double-ended construction with a resilient coupling sleeve 127, which as indicated in FIGS. 8a and 8b, respectively, is held by the insulating material rings 124 positively in an axial direction. For this purpose, in accordance with FIG. 8a, the bush 127 has an externally projecting collar 128, which fits into corresponding recesses in the insulating material rings. In accordance with FIG. 8b the coupling spring connector 127 is axially held at the ends. As can be seen from FIG. 8c the bush is so clamped that the contact tab ends lie against the inserted inner conductor sections with a radially exerted resilient action. The insulating material rings 124 are provided with a step 128a at the end, in order to accept an annular land 129 of the coupling sleeve 27 or a pressing ring 130, the latter lying in a machined out annular recess of the sleeve 27. The rings 124 can be made of solid insulating mate rial or of foam material. The dielectric is so constructed that the wave resistance tallies. A laminated construction of insulating material and air is made and the air gap again allows for radial movement in order to compensate for eccentricity. In particular in the zone indicated by reference numeral 131 the construction is such that reflection is reduced to a minimum.

In order to hold the rings 124, instead of the embodiments shown, the pressing ring 12 can be provided with a corresponding axial extension.

In the case of the embodiment in accordance with FIG. 9 the arrangement and construction of the inner conductor plug connection and the holding means for the insulating material rings 124 are to be selected ac- I cordingly. In this case the distance e is so chosen that the wave resistance is compensated for and no reflections occur.

The cable plug connector in accordance with the invention is generally applicable for cables with a metal casing, irrespectively of whether it is a question of a corrugated casing cable or a smooth casing cable. It can also be used in the case of cable casing welded in the longitudinal direction and in this case as well there is a satisfactory making of contact, because the crimping tool causes the weld seam to be polished and flat at the position at which crimping takes place.

What I claim is:

1. An HF cable and coaxial plug connector combination;

said HF cable having an interior conductor, an exterior conductor and a cable dielectric material layer therebetween; said dielectric layer having an end at said connector;

said connector comprising:

a clamping ring attached around the exterior of said cable; said clamping ring having a portion with a conical interior surface that tapers outwardly toward a pressure ring;

said pressure ring having a portion with a conical exterior surface mating with said tapering interior surface of said clamping ring, thereby to enable said cable exterior conductor to be clamped between said conical surfaces;

a head which is separated from and has a surface abutting said pressure ring; means connected with said clamping ring, to be engaged by said head, such that said head is movable toward said clamping ring and presses said pressure ring against said clamping ring and crimps said exterior conductor therebetween;

an internal conductor pin within said cable and affixed in said internal conductor; said pin having a radially projecting flange which presses against said dielectric layer end and provides axial support to said cable dielectric material layer; said internal conductor pin being screwed into said cable internal conductor; a further internal conductor section being screwed into said internal conductor pin; a plug bush joining and making electrical contact between said internal conductor pin and said internal conductor section.

2. The HF cable and coaxial plug combination of claim 1, wherein said clamping ring has a radial opening therethrough, through which a sealing material is injected between said clamping ring and said cable.

3. The HF cable and coaxial plug combination of claim 2, in which a rubber ring is clampingly positioned between said clamping ring and said cable sideways away from said injected sealing material, thereby to retain that sealing material from moving sideways.

4. The HF cable and coaxial plug combination of claim 1, wherein a plug bush is within said cable; a ring of insulating material surrounds said plug bush and is radially spaced therefrom leaving an annular gap therebetween.

5. The HF cable and coaxial plug combination of claim 4, wherein said plug bush is provided with resilient tabs by means of axial slotting such that'said bush is adapted to take up any eccentricity that may be present.

6. The HF cable and coaxial plug combination of claim 4, in which there is an insulating support in said head for carrying said internal conductor; said insulating support for said internal conductor being integral with said insulating material ring surrounding said plug bush.

7. The HP cable and coaxial plug combination of claim 6, in which said insulating material ring and said insulating support are made of polytetrafluoroethylene.

8. The HP cable and coaxial plug combination of claim 1, wherein said dielectric layer is radially spaced from the said connections between said internal conductor pin and the other elements of said internal conductor producing an air gap of a size to compensate for eccentricity and said air gap and said dielectric layer being of selected size so as to provide predetermined dielectric resistance.

9. An HF cable and coaxial plug connector combination;

said HF cable having an interior conductor, an exterior conductor and a cable dielectric material layer therebetween; said dielectric layer having an end at said connector;

said connector comprising:

a clamping ring attached around the exterior of said cable; said clamping ring having a portion with a conical interior surface that tapers outwardly toward a pressure ring;

said pressure ring having a portion with a conical exterior surface mating with said tapering interior surface of said clamping ring, thereby to enable said cable exterior conductor to be clamped between said conical surfaces;

a head which is separated from and has a surface abutting said pressure ring; means connected with said clamping ring, to be engagedby said head, such that said head is movable toward said clamping ring and presses said pressure ring against said clamping ring and crimps said exterior conductor therebetween;

said connector including a transition piece in which said head is integrated; said transition piece including a second head facing in the direction opposite the first mentioned said head;

a ring of insulating material is around and spaced from that portion of said interior conductor that passes through said transition piece; a resilient double bush separate from said ring of insulating material is held around and in engagement with said interior conductor by said ring of insulating material; said ring of insulating material having two adjacent sections and axial ends of said ring of insulating material sections are adjacent to said interior conductor; at said axial ends of said ring of insulating material, compensation measures, lead to a minimum reflection sector.

10. The HF cable and coaxial plug combination of claim 9, wherein at said axial ends of said ring of insulating material rings on the exterior thereof are provided recesses in which are positioned internal flanges which are in turn affixed to said external conductor.

11. The HF cable and coaxial plug combination of claim 10, wherein said internal flange which is affixed to said external conductor is integrally produced with said transition piece.

12. The HF cable and coaxial plug combination of claim 10, in which said recess around said insulating ring has a pressing ring in it; said transition piece having an interior recess into which said pressing ring is fitted. 

1. An HF cable and coaxial plug connector combination; said HF cable having an interior conductor, an exterior conductor and a cable dielectric material layer therebetween; said dielectric layer having an end at said connector; said connector comprising: a clamping ring attached around the exterior of said cable; said clamping ring having a portion with a conical interior surface that tapers outwardly toward a pressure ring; said pressure ring having a portion with a conical exterior surface mating with said tapering interior surface of said clamping ring, thereby to enable said cable exterior conductor to be clamped between said conical surfaces; a head which is separated from and has a surface abutting said pressure ring; means connected with said clamping ring, to be engaged by said head, such that said head is movable toward said clamping ring and presses said pressure ring against said clamping ring and crimps said exterior conductor therebetween; an internal conductor pin within said cable and affixed in said internal conductor; said pin having a radially projecting flange which presses against said dielectric layer end and provides axial support to said cable dielectric material layer; said internal conductor pin being screwed into said cable internal conductor; a further internal conductor section being screwed into said internal conductor pin; a plug bush joining and making electrical contact between said internal conductor pin and said internal conductor section.
 2. The HF cable and coaxial plug combination of claim 1, wherein said clamping ring has a radial opening therethrough, through which a sealing material is injected between said clamping ring and said cable.
 3. The HF cable and coaxial plug combination of claim 2, in which a rubber ring is clampingly positioned between said clamping ring and said cable sideways away from said injected sealing material, thereby to retain that sealing material from moving sideways.
 4. The HF cable and coaxial plug combination of claim 1, wherein a plug bush is within said cable; a ring of insulating material surrounds said plug bush and is radially spaced therefrom leaving an annular gap therebetween.
 5. The HF cable and coaxial plug combination of claim 4, wherein said plug bush is provided with resilient tabs by means of axial slotting such that said bush is adapted to take up any eccentricity that may be present.
 6. The HF cable and coaxial plug combination of claim 4, in which there is an insulating support in said head for carrying said internal conductor; said insulating support for said internal conductor being integral with said insulating material ring surrounding said plug bush.
 7. The HF cable and coaxial plug combination of claim 6, in which said insulating material ring and said insulating support are made of polytetrafluoroethylene.
 8. The HF cable and coaxial plug combination of claim 1, wherein said dielectric layer is radially spaced from the said connections between said internal conductor pin and the other elements of said internal conductor producing an air gap of a size to compensate for eccentricity and said air gap and said dielectric layer being of selected size so as to provide predetermined dielectric resistance.
 9. An HF cable and coaxial plug connector combination; said HF cable having an interior coNductor, an exterior conductor and a cable dielectric material layer therebetween; said dielectric layer having an end at said connector; said connector comprising: a clamping ring attached around the exterior of said cable; said clamping ring having a portion with a conical interior surface that tapers outwardly toward a pressure ring; said pressure ring having a portion with a conical exterior surface mating with said tapering interior surface of said clamping ring, thereby to enable said cable exterior conductor to be clamped between said conical surfaces; a head which is separated from and has a surface abutting said pressure ring; means connected with said clamping ring, to be engaged by said head, such that said head is movable toward said clamping ring and presses said pressure ring against said clamping ring and crimps said exterior conductor therebetween; said connector including a transition piece in which said head is integrated; said transition piece including a second head facing in the direction opposite the first mentioned said head; a ring of insulating material is around and spaced from that portion of said interior conductor that passes through said transition piece; a resilient double bush separate from said ring of insulating material is held around and in engagement with said interior conductor by said ring of insulating material; said ring of insulating material having two adjacent sections and axial ends of said ring of insulating material sections are adjacent to said interior conductor; at said axial ends of said ring of insulating material, compensation measures, lead to a minimum reflection sector.
 10. The HF cable and coaxial plug combination of claim 9, wherein at said axial ends of said ring of insulating material rings on the exterior thereof are provided recesses in which are positioned internal flanges which are in turn affixed to said external conductor.
 11. The HF cable and coaxial plug combination of claim 10, wherein said internal flange which is affixed to said external conductor is integrally produced with said transition piece.
 12. The HF cable and coaxial plug combination of claim 10, in which said recess around said insulating ring has a pressing ring in it; said transition piece having an interior recess into which said pressing ring is fitted. 